Top portion housing of a mobile device



FIG. 1 is a first side of the top portion;

FIG. 2 is a second side view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a third side view thereof;

FIG. 5 is a fourth side view thereof; and

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a isometric view thereof.

The broken lines shown in FIGS. 1-7 are included for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a top portion housing of a mobile device, as shown and described. 